Tire-stem pressure gauge



H. J. L .El VESCONTE April 6 1926.

TTRE STEM PRESSURE GAUGE oct. 9, 192.?

l f/ ////////////MN////// x K Patented `Apr. 6, 1926. l

UNITED STATES PATENT OFFICE.'

HAROLD J. LE vEScONTE, or CHARLESTON, WEST vmofINIA,v

lASSIGNTTTENTS, To TIREGAGE VALVE CORTOEATIQN, OE CILABLESTON, GINIA, A CORPORATION OJ."l WEST VIRGINIA.,

AssreNoR, :SY vInserm WEST VIR- .TIRE-STEM vTrmssrirre (rauen. i

sprecati@ nea, october 9, 1.922. semi No. saaie@- To all whom it may concern.' V

Be it known that I, HAROLD il. Ln VES- CONTE, a citizen of the United States, ref siding at Charleston, in the county OfKanawha and State Of West Virginia, have invented new and useful Improvements in Tire-Stem Pressure Gauges, of which the following is Va .Yspeeiticationr This invention is designed to improve pneu matic tire stemsand particularly such stems as are provided with pressure. gauges, One

of the features of the invention relates to providing a spreader for a tire stem whereby it may be turned with relation to the tire stem Vso as to adapt it for differentwheels. `The invention further consists in `improvements of a tire stem pressure gauge and generally consists in assembling the parts by providing an outwardly Opening socket.k

in the head of the stem into which the sleeve of the stem is secured. Other features of the invention will appear from the specification and claims.

The invention lis illustrated in the acf companying drawings as follows:

Fig.l 1y shows a central vertical section through the Stem.

' Fig. '2 a section onthe line 2-2 in Fig. 1. Fig. 3 a plan view of the clamping plate. Fig. 4 a section Of the anchor plate. Fig. 5 a section on'the line 5,-5 in Fig. 4. Fig. 6 is an alternative construction of the base.

1 marks the tire stem sleeve. This is screwthreaded throughout its length as is conimon and is provided with flats along the sides at 1a. The head 2 has a screw-thread ed socket 3 opening outwardly into which the sleeve 1 is screwed. After the assembly of the parts it is locked in thisvposition either by spot welding or by crimping the wall of the socket against the flat 1a. This permits of forming the sleeve with a continuous screw thread and simplifies the manufacture and at the same time' simplifies the structure of ythe tire stem gauge. A clamping plate 4 has the usual corrugated surface 5 opposing' the surface` 6 On the head 2,. the tire tube being clamped between thesel surfaces. A spreader 7 has the usual tapered ends and is secured on the plate 4 by a clampingnut 8. The plate 4 has the detents 9,'preferably four of them, arranged at ninety degrees apart and the spreader has the tongues 10 against turning 11 isslidablymounted in the sleeve.

l removed in the ystamped into it, these extending into the detents 9, thus locking the against 'turning and permitting of the adiustment of the plate ninety degrees to adapt spreader platev it for use with different wheels. The lelam'ping plate 4 has` its Opening conforming to the sleeve 1 and is consequently locked on said sleeve, thel opening being4 clearly shown in Fig, 3. A plunger a central opening lZextending through it in whichV is 'arranged'thef usual inside valve A cap 14 isscrewed on tothe Outer end and these same screw threads are adapted 1t hasy eol to receive a pump connection when the cap is usual manner. The plunger hasa key-way" 15 which lis lengaged by a key or detent16 in the sleeve' and thus' is locked against turning in the sleeve. The plunger. is provided with a shoulder 17 which is adapted to engage .an internal shoulder 18 on the end of the sleeve 1, thus preventing the disengagement of the plunger from thesleeve.V

An, extensible tube 19 preferably' of rubber is arranged on a nipple' 20 extending from the lower end of the plunger and is secured thereon by a wrapping of twine or similar material AQ1. The lower end of the tube extends over a nipple 22 and is secured thereon byl a wrapping 23. arranged on an anchor plate 24. n

' This anchor plate has an opening 26 extending through it completing the communication from the interior of the tire tubeV through the stem. It has slots 27 in its periphery which are engaged by projections 28 on the lower end Of the sleeve 1, the lower end 29 of the sleeve otherwise seating on the top of theanchor plate so that as the'sleeve 1 is screwed into the socket it seats the anchor plate'and at the same time the anchor plate is ly to thefsleeve. A gasket 30 is yarranged in the bottom of the socket 3. A metal washer 31 is provided and preferably arranged above the gasket so as to permit of the easy turning of the anchor plate as the sleeve is screwed down to place. chor platehas an extension 32 which extends through the gasket thus preventing the inward compression of the gasket in a manner to close the opening.

A spring 33 is secured to the plunger by The nipple islocked against turning relative-y The anbein@ screw-ed onto screw threads 3a at the lower end of the plunger. The spring is also secured to the anchor plate being screwed onto screw threads 35. At the base of the screw threads on both the anchor plate and the plunger there is a groove 36 into which the end of the spring extends so as to lock the spring against unscrewing in the action ot' the gauge. A cap 37 is mounted in a screw-threaded base 38 and this base is screwed on the stem in the usual manner7 the cap 87 being transparent so that the position of the plunger which is usually provided with a scale may be observed. The usual nut 39 is provided for securing the sleeve on the elloe of the wheel. The base 38 is clamped against this nut.

It will be observed that inasmuch as the plunger is locked with the sleeve by the key or detent 16 and the anchor plate is locked with the sleeve there is no twisting or turning of the tube or spring as the parts are assembled.

In the alternative construction the anchor plate 24 has a tapered end 24h which makes a tight lit in the opening 40 in the base 2a. If this is carefully done a tight joint may be provided thus avoiding the necessity of the gasket.

bination of a head having an outwardly opening screw-threaded socket; a sleeve screwed into the socket; a plunger in the sleeve; an expansible tube secured to the plunger; and an anchor plate to which the tube is secured secured in the socket by the sleeve, said plate being locked against` rotation relatively totheY sleeve.

2. In a tire stem pressure gauge7 the cornbination of a head having an outwardly opening socket lia-ving a scrcw-threaded wall, the bottom of the socket extending integrally inwardly from the screw-threadr ed wall; a sleeve screwed into the socket; a plunger in the sleeve slidingly mounted therein but locked against rotation; an expansible tube secured to the plunger; and an anchor plate to which the tube is secured secured in the socket by the sleeve, said anchor plate being locked against rotation relatively to the sleeve.

In testimony whereof I have hereunto set my hand.

HAROLD J. LE VESCONTE. 

